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91 Maxima heater intermittent


we3cats's Avatar
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01-20-03, 11:50 AM   #1  
we3cats
91 Maxima heater intermittent

Heater intermittently goes warm/cold (random but like 2 min intervals w/max heat setting). Radiator has not been flushed at least 5 yrs. and first time driving it in winter in 5 years. Radiator fluid full w/ adequate antifreeze. Sometimes changing airflow direction seems(?) to change it to warm.
Suggestions?

 
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01-20-03, 12:49 PM   #2  
fordman30
since it has been 5 years i would flush the crap out of it ..........and then replaced the t-stat. with a 50-50 mix on the anti-freeze

 
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01-20-03, 12:50 PM   #3  
fordman30
since it has been 5 years i would flush the crap out of it ..........and then replaced the t-stat. with a 50-50 mix on the anti-freeze

 
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01-20-03, 02:17 PM   #4  
Joe_F
At minimum a coolant flush and a new thermostat....see where that nets you.

Beyond that, 5 years is way too long on a coolant change and you may have wasted other parts of the cooling system by waiting so long.

 
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02-27-03, 10:29 AM   #5  
we3cats
Follow-up: I found I had lost radiator fluid with a pinhole in the upper radiator hose. I replaced the hose and filled the system and have had steady heat since. I'm not sure if I assumed it was full because of having checked this in Nov or if the reservoir tank still had antifreeze in it.

 
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